Utility knife



FIG. 1 is a top, front and left side perspective view of a utility knife embodying the new design, wherein the blade mechanism is in the extended position;

FIG. 2 is a top, rear and right side perspective view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a rear elevation view thereof;

FIG. 8 is a front elevation view thereof; and,

FIG. 9 is a top, front and left side elevation view, wherein the blade mechanism is in the retracted position.

The shading lines shown in the drawings represent the approximate three-dimensional contour of the design, and are not intended to indicate surface decoration.

The broken line showings of the blade form no part of the claimed design. 

CLAIM We claim the ornamental design for a utility knife, as shown and described. 